| 1 | E & S Resources LLC | Crescent, OK 73028-0532 | Oil & Gas Operator | Feb 2024 |
| 2 | Eagle Energy PTR I LP | Houston, TX 77064 | Oil & Gas Operator | Feb 2015 |
| 3 | Eagle Gas Marketing Co | Oklahoma City, OK 73114-2202 | Oil & Gas Operator | Nov 2022 |
| 4 | Eagle Rock Mid-Continent Operating LLC | Tulsa, OK 74103-3703 | Oil & Gas Operator | Jan 2024 |
| 5 | Earlsboro Energies Corporation | Oklahoma City, OK 73116-3605 | Oil & Gas Operator | Jan 2024 |
| 6 | Eastok Energy Partners LLC | | Oil & Gas Operator | Jan 2024 |
| 7 | Eberly & Meade | Oklahoma City, OK 73118 | Oil & Gas Operator | Jul 2002 |
| 8 | Edinger Engineering, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2024 |
| 9 | Eec Inc | Norman, OK 73069-6344 | Oil & Gas Operator | Feb 2024 |
| 10 | El Paso Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2016 |
| 11 | Eland Energy Inc | Dallas, TX 75248 | Oil & Gas Operator | Feb 2024 |
| 12 | Elite Resources Inc | Cleveland, OK 74020-0614 | Oil & Gas Operator | Feb 2024 |
| 13 | Enable Gas Transmission LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2022 |
| 14 | Encore Operating LP | Plano, TX 75024 | Oil & Gas Operator | Feb 2024 |
| 15 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 16 | Enerwest Trading Co LLC | Duncan, OK 73534 | Oil & Gas Operator | Jan 2024 |
| 17 | Enogex Services Corporation | Oklahoma City, OK 73124-0300 | Oil & Gas Operator | Apr 2009 |
| 18 | EOG (Oklahoma) Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Oct 2016 |
| 19 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 20 | Eott Energy Operating LP | Houston, TX 77210-4666 | Oil & Gas Operator | Oct 2009 |
| 21 | EP Energy E&P Company, LP | Houston, TX 77210 | Oil & Gas Operator | May 2022 |
| 22 | Escher Corporation | Oklahoma City, OK 73120 | Oil & Gas Operator | Jan 2024 |
| 23 | Esco Exploration, Inc | Dallas, TX 75201 | Oil & Gas Operator | Mar 2015 |
| 24 | Esis Inc | | Oil & Gas Operator | Feb 2017 |
| 25 | Eubank Michael Dba Trilby Oil Company | | Oil Operator | May 2022 |
| 26 | Evolution Energy LLC | | Oil & Gas Operator | Jan 2024 |
| 27 | Excalibur Resources LLC | | Oil & Gas Operator | Jan 2024 |
| 28 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Jan 2024 |
| 29 | Exploration Associates II LLC | Oklahoma City, OK 73102-8815 | Oil & Gas Operator | Jan 2013 |
| 30 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Apr 2024 |
| 31 | Exxonmobil Oil Corp | Houston, TX 77210 | Oil & Gas Operator | Mar 2024 |